Air-heating system for fireplaces



Oct. 18, 1927. 1,645,586

J. M. CESA AIR HEATING SYSTEM FOR FIREPLACES Filed Jan. 10, 1927INVENTOR.

Patented Oct. 18, 1927.

.iosnrn M. CESA, or nnrrrocn, canrronnrn.

AIR-HEA'IIN G SYSTEM- -FOB FIREPLACES.

Application filed January 10,1921. .Serial No. 160,029.

vThis invention relates to improvements in means for heating andcirculating air, through the rooms of ahouse by means of theheat fromthe'fire of, an ordinary open fireplace; and' particularly represents amodification or enlargement of the arrange, ment shown in my PatentflNo,1,609,693

' H dated December 7th, .1926. In the previous device a blower wasutilized to create an 10 artificial air draft or current, which air wasforced through the drum in the fireplace and issued thence in ,a heatedcondition from the registers or vents disposed at various points inthehouse. .l/Vhen'the blower was not in operation there was noappreciable circulation of air through the drum, and therefore noheatedair issued from the registers.

. The principal object of the present invention-the'refore is to modifyor enlarge the abovev arrangement of parts by providing means forenabling a natural circulation of air through the drum to beautomatically maintained when desired, when the operation. of ,theblower isdiscontinued, so that the heated air will continue to issueinto one room or another to keep the air therein at a desirably hightemperature. WVith this imj proved arrangement it is not necessarytherefore to run the blower continuously in order to obtain the benefitsfrom my air heatingdevice and the cost of operation of the system over agiven period'of time may be considerably reduced.

A further .object of the invention is to produce a simple andinexpensive deviceand yet one which will be exceedingly effective forthe purpose for which it is designed.

These objects I accomplish by means of such structure and relativearrangement of parts as willfully appear by a perusal of the followingspecification and claims.

- In the drawings similar characters of f referenceindicatecorresponding parts in the several views:

nary fireplace showing my improved air heating arrangement installed inconnection therewith.

Fig. 2 is a fragmentary sectional elevation of the apparatus showing amodified arrangement of the hot air discharge pipe.

Referring now more particularly to the characters of reference onthedrawings, the main features of the system, as before, comprise avertically disposed rectangular drum 1 set against the back of thefireplace 2, the

Fig. 1 is a sectional elevation of an ordi-- drum projecting upwardlyfrom the bottom of the fireplace to a point adjacent the chimney 3, Thedrum then turns outwardly to form a horizontal portion 4, from the outerend of whicha downwardly projecting portion 5 depends said latterportion being of course spaced from the front of the base of the chimneysufiicient to enable the, products of combustionfrom the fire in thefireplace to pass freely to and up the chimney. A longitudinal partition6 in the drum extends fromthe bottom thereof to: a point short; of thebottom of the outer end portion 5, This partition dividesthe drum intotwo separated compartments 7 and 8, the former in the main rearportion-of the drum being at the back of the fireplace. The

bottom of the compartment .7 is connectedto an intake pipe 9 whichextends downwardly therefrom and isconnectedtothe discharge of a blowerlOof suitable character located in the basement or elsewhere as may bedesired. From the bottom of the compaitment 8 a dischargepipe ll leadsunder the floor 12 of the building, said pipehaving one or moredischarge registers or outlets l3 projecting into any desired room ofthe house to discharge the heatedair into. the same at a point adjacentthe floor. The above parts are thesame as shown andfdescribed in, theprevious patent, audit, will be seen that when the bloweris in operationthe circulating air will pass. upwardly through the pipe 9 into the drumthroughthe compartment 7 for the full length thereof, then into. andthrough. the compartment 8, and thence into the -pipe 11 to dischargeinto the room through the register 13. This direction of the flow ofairis shown by the.

The. air passing solid arrows in Fig. 1. through the drum is heated bythe heat from the fire in the fireplace so that "when itissues from. theregister l3, said air .is still in a heated condition. v

\Vith this arrangement there is no circulation ofair to'any appreciableextent when the operation of .the blower is discontinued. as will beobvious. My additional feature whichenables the desired circulation ofair to be maintained when the blower is not in operationcomprises anadditional outlet passage leading from the top of the drum directlyintoa; room ata level higherthan that of'the register- 13. In thearrangement shown in Fig. 1, the fireplace is presumed as occupying aninterior position in the building, so that there are rooms both in frontof and behind the fireplace. In this case the additional drum outlet 14:preferably leads through the back of the fireplace into the room beyond.in the arrangement shown in Fig. '12 the fireplace occupies a positionin the exterior wall of the building, in which case the drum outlet letprojects forwardly of the drum into the same room as that in which thefireplace is located. Both arrangements of outlet have a suitableshutter or damper device as at 15 arranged to be manually manipulated sothat the outlet may be opened as much as desired or entirely closed. Thelatter position of the shutter is had when the blower is in use so thatsaid outlets 14: or 1% do not then function;

. If the blower is discontinued however the shutter is opened, and sincethe outlet M is higher than the register 13 (toward'whicli the colderair in the room naturally gravitates) a circulation of air from theregister to the outlet 14 will, be had. in other words relatively coldair enters the pipe 1 1 from the register 13, moves along said pipe intothe drum 1, along the compartment 8 (which is nearest the fire) for thefuil length thereof, and thence into the upper portion of thecompartment 7 and out through the outlet 14 (or is as the case may be).The direction of movement of this current of air is shown by the dottedarrows in Fig. 1 and, as will be evident, is the reverse of thedirection had'when the blower is operating. This re versed circulationof air by means of which hot air is discharged into a room from theupper drum outlet will continue as long as a fire is maintained in thefireplace or as long as the temperature in the room at the level of theoutlet l t isgreater thanthat at the level of the register.

From the foregoing description it will be readily seen that I haveproduced such a'device as substantially fulfills the objects of theinvention as set forth herein.

While this specification sets forth in cletail the present and preferredconstruction of the device, still in practice such deviations from suchdetail may be resorted to as do not form a departure from the spirit ofthe invention, as defined by the appended claims.

Having thus described my invention what I claim as new and useful anddesire to secure by Letters Patent isz' 1-. In combination, a drum to bemounted in a fireplace to be subjected to the heat of a fire therein,means dividing said drum into two vertical compartments, saidcompartments being arranged to communicate with each other at theirupper ends,anintake passage leading to the bottom of one comartment, anoutlet passage leading from the ottom of the other compartment, saidoutlet passage leading to a room, means for setting up a forcefulcirculation of airthrough the drum compartments from the intake passageto the outlet passage, and another outlet from the drum; said outletsbeing arranged in height relative to each other so that when theoperation of said circulating means is discontinued a naturalcirculation of air may be set up from the first named outlet through oneof the drum compartments to the last named outlet.

In combination, a drum to be mounted in a fireplace to be subjected tothe heat of a fire therein, means dividing said drum into two verticalcompartments, said compartments being arranged to communicate with eachother at their upper ends, an intake passage leading to the bottom ofone compartment, an outlet passage leading. from the bottom of the othercompartment, said out-let passage leading to a room adjacent the floorthereof, means for setting up a forceful circulation of air through thedrum compartments from the intake passage to the outlet passage, anotheroutlet from the top of the compartment of the drum to which the intakepassage is connected, said-last named outlet leading to a room at alevel higher than that of thefirst named outlet, and a manually operableshutter in said last named outlet. V r

.3. In combination, a drum to be mounted in a fireplace to besubjectedto the heat of afire therein, means dividing said drum into two verticalcompartments, said compartments being arranged. to communicate with eachother at their upper ends, an intake passage leading to the bottom ofone coinpartment, an outlet passage leading from the bottom of theother.compartmenu'said .outlet passage leading to a room adjacent the floorthereof, means for setting up a forceful circulation of air through thedrum compartments from the intake passage to the outlet passage,'anotheroutlet from the drum;

said last named outlet.

4. An air heatingsystem comprising an air passagemember to be mounted ina fireplace to be subjected to the heat of a fire therein, an inlet-toone end of said member, an outlet passage from the other end of themember leading to. a room, means for setting up a circulation of airthrough the passage member from the inlet to the outlet, and an othernormally closed outlet from the passage member in spaced relation to thefirst named outlet and terminating in room at'a higher level than saidfirst named outlet.

In testimony whereof I affix my signature.

JOSEPH M. CESA.

